Gas-engine crank-case-charging device



W. H. HUNT.

GAS ENGINE CRANK CAS E CHARGING DEVICE.

APPLICATION FILED JUNE 19. 1917.

Patented Nov. 23, 1920.

M 4 w J UNITED STATES WILLIAM H. HUNT, 0F NATIONALCITY, CALIFORNIA.

GAS- ENGINE CRANKCASE-GHARGING DEVI CE.

Specification of Letters Patent.

Patented Nov. 23, 1920.

Application filed June 19, 1917. Serial No. 175,603.

To all w 710m it may concern:

Be it known that I, l/VILIJAM H. HUNT, a

citizen of the United States, residing at National City, in the county of San Diego and State of California, have invented certain new and useful."Improvements in Gas- Engine Crank-CaseCharging Devices, of which the following is a specification.

My invention relates to a device of this class with the crank case of a gas engine for forcing the gas into the crank case at intervals and the objects of my invention are: first, to provide means for producing increased carbureter action and a better mixture of the fuel and air by reason of the highvelocity of the gas from the carbureter to thecrank case; second, to provide a device of this class which will relieve the piston of the duty of drawing in the new charge whereby the crank case volume need notbe unduly reduced; third, to provide a device of this class whichwill equalize the crank case compression to suit any engine speed thereby making it possible to transfer 25 a full charge of gas to the working cylinder at any engmespeed; fourth, to provide a device of this class which may be constructed to supply a charge of gas in any proportion of the piston displacement de sired; fifth, to provide a device of this class by the use of which it will bepossibleto procure a full cylinder of gas at each suction stroke; and sixth, to provide a device of this class which is very simple andeconomica] of construction, durable, easy to operate and is applicable to the different makes of Vi ith these and other objects in View as will appear here1nafter,my invention consists of certain novel features of construction, combination and arrangcnient of parts as will be hereinafter described indetail and particularly set forth in the appended claims, reference being had. to the accompanying drawin s and to the characters of reference thereon which form apart of specification in which: a

Figure 1 is a sectional view of a crank case showing my devicein connection there with, and showing by dottedlinesthe varying position of the charging member; Fig. 2 is a sectionalview thereof at wright angle tothat of Fig. hand Fig, 3 is afront elevational view of the crank case with my this device in position thereon.

Similar characters of reference refer to similar parts throughout the several views. The crank case 1, auxiliary crank shaft 2, connecting rod 3, plunger l, valve 5, valve 6, casing extension 7, plate 8, support 9, cylinder l0, and main crank shaft 1]. constitute the principal parts of my structure.

Thefcrank case 1 is similarly shaped to theconventional crank casefckcept the portions which are changed for the application described and I have herein, illustrated the same for a one cylinder 2 cycle gas engine. This crank case is provided with the bearings 1 adapted for the main shaft 11 which is revolubly mounted therein. In the upper portion of said casing 1 and extending inwardly and outwardly from thewall of said casing is the bearing l in which is revolubl mounted a small auxiliary crank shaft 2. Itsopposite end is supported by thebearing 1 which is secured to the case 1 by bolts 1. Said crank shaft 2 extends outwardly through the crank case on one side and on the outwardly extending end is secured a end is pivotallyconnected to a lug 4 near the upper side of the plunger 4. This connecting rod 3 consists of two bars 3 and 3" spacing apart from each other a? sufiicient distance to permit the main connecting rod engine crank cases and will not readily de- *teriorate or get out of order.

extension portion of the crankcase 7 and made tight by means of gasket 7*. This extension? is wide at itsupper side and narrow atits lower side. The lower side comprising a semi circular member 9 invwhich is pivotally mounted the lower side of the plunger 4:. The upper side of this casing extension 7 is curvedon the radius fromlthe 4 so asto provide a fit of the plunger 4 in its movement back and forth in said extended of my device thereto as will be hereinafter i one end of theconnecting rod 3 and its other portion. This plunger is provided in its Valve 5 which is held closed by means of a Hat spring 5 secured thereto and secured to the plunger f thus providing a valve which is opened by pressure and closed by the spring when the pressure is relieved. Secured to the face of said extended portion 7 .is'the plate Sby means of bolts8 and-provided with gaskets S for providinga tight fit. Mounted on the outer side of this plate 8 is an extension 8 provided with a flange 8 which is adapted for the connection of the carbureter. Mounted in this plate, comm'unicatingv with the hole in the extension to the carburetor is a valve (3' which is held closed by means ofia plate spring 6 thereby providingavalve which is held closed by the springandopenedby pressure. The crank case communicateswith by-passes 10" leadingto' theintake of the cylinders;

Though I have shown and described a particular construction, combination and arrangement of parts, Ido not wish to be limited to this particular construction, combination and arrangement but desire to include in the purview of my invention the construction, combination and arrangement substantially as set forth in the appended claims. K V

It is obvious that with this construction there isprovided a plunger which is pivotally= mounted atits lower-side and adapted to swingion said pivot in the extension 7 and -made tight by the packing 4;. That with the revolution, of the main shaft 11, the auxiliary shaft 2 will revolve which in turn .will move the plunger 4 backwardly and forwardly at its upper side. That when the plunger 4; moves inwardly toward the crank case- 'the valve 5 will be closed, compressing the gas in the-crank case and forcing it into by-pass IO at the same time-avacuum will be caused between theplunger 4 and the plate 8 from the carburetor and in the outward movement of said plunger 4 the-valve 6'will-be closed and the valve 5 opened, causing the gasbetween said plunger 4 and the plate'8 to-enter the crankcase.

7 Having.- thus described my invention what I claim as newand" desire to secure by Letters Patent is 1. In a device of the classdescribed the combination with a crank case and main crankshaft, of an extended portion secured to oneside of said crank case, a plunger reciprocallymounted: at one side thereof in sa d extended port 1on,a valve mounted in said: plunger, a valve mounted in the outer side portion ofl'said extension and means connected with themainshaft of the engine for reciprocating: said plunger.

2, Inw a device of the class-described,-the combination with a gas engine crank case and-maincrankshaft of an extending portion secured-ito oneside of said crank case comm'unicatin'g intemally' therewith, a plunger reciprocally mounted in said extended por tion, aninlet valve mounted in said extended portion, an outlet 'alve communicating therewith and with said crank case and means in connection with said plunger, actuated by the main shaft of the engine for reciprocating said plunger.

3. In a device of the class described, the combination with a gas engine crank case and main crank shaft, of an extending portion secured to one side of said. crank case communicating internally therewith, a plunger reciprocally mounted in said extended portion, a valve mounted in said plunger, a valve mounted in the inlet to said extended portion and means in connection with said plunger, actuated by the main shaft of the engine for reciprocating said plunger.

4:. n a device of the class described, the combination of a gas'engine crank case, a main crank shaft mounted therein, a plunger fitting the one side of said crank case pivotally mounted at one of its sides adapted to swing inwardly and outwardly over a portion of. interior of said crank case, a carburetor, a valve mounted in said plunger, a valve in the communication between the carbureter and said valve in the said plunger and means connecting said plunger with the main shaft of-the engine for operating said plunger.

5. In a device ofthe class described, the combination of a gas engine crank case, acrank case mounted therein, a plunger fitting the one side of said crank case pivotally mounted at one of its sides adapted to swing inwardly and outwardly over a portion of interior of said crank case, a carburetor, a valve mounted in said plunger, a valve in the communication between the carburetor and said valve in the said plunger and means connecting said plunger with the main shaft of the engine for operating said plunger, comprising an auxiliary crank shaft revolubly mounted in said crank case gears mounted on said auxiliary shaft and on the main engine shaft meshing with each other and a connecting rod with one end pivotally mounted on said auxiliary crank shaft and its other end pivotally connected to said plun er.

6. in a device of the class described, the combination of a carbureter, a crank case provided with an extended portion on one side communicating with the carburetor, a crank shaft mounted. in said crank case, a valve mounted in saidcrank case at said extended portion, a plunger pivoted at one side and adapted to move back and forth at its opposite side, a valve mounted in said plunger and means connected with the main shaft of the engine for moving the free side of the plunger back and forth.

7. In a device of the class described, the

combination of a carbureter, a crank case provided with an extended portion on one side communicating with the carburetor, a crank shaft mounted. in said crank case, a valve mounted in said crank case at said extended portion, a plunger pivoted at one side and adapted to move back and forth at its opposite side, a valve mounted in said plunger and means connected with the main shaft of the engine for moving the free side of the plunger back and forth, comprising an auxiliary crank shaft revolubly mounted 111 said crank case gears mounted on said auxlhary shaft and on the mam engine shaft meshing with each other and a connecting 15 my hand at San Diego, California this 14th 20 day of June, 1917.

WILLIAM H. HUNT. 

